Results 11 to 20 of about 1,291,382 (295)

Evaluation of Ozone Formation Potential of Formaldehyde Using Smog Chamber Data

open access: yesAerosol and Air Quality Research, 2023
Formaldehyde (HCHO) is one of the important O3 precursors in the atmospheric environment, but the mechanism for HCHO photochemical reactions is not very clear now. In the present study, the effects of relative humidity (RH) and initial VOC/NOx ratio (RCN)
Hailiang Zhang, Yongfu Xu, Long Jia
doaj   +1 more source

The effect of wall cooling on a compressible turbulent boundary layer [PDF]

open access: yes, 1974
Experimental results are presented for two turbulent boundary-layer experiments conducted at a free-stream Mach number of 4 with wall cooling. The first experiment examines a constant-temperature cold-wall boundary layer subjected to adverse and ...
Gran, R. L., Kubota, T., Lewis, J. E.
core   +1 more source

Wind-driven mixing below the oceanic mixed layer [PDF]

open access: yes, 2011
This study describes the turbulent processes in the upper ocean boundary layer forced by a constant surface stress in the absence of the Coriolis force using large-eddy simulation.
Belcher, Stephen, Grant, Alan L. M.
core   +1 more source

An improved process-oriented hydro-biogeochemical model for simulating dynamic fluxes of methane and nitrous oxide in alpine ecosystems with seasonally frozen soils [PDF]

open access: yesBiogeosciences, 2021
The hydro-biogeochemical model Catchment Nutrient Management Model – DeNitrification-DeComposition (CNMM-DNDC) was established to simultaneously quantify ecosystem productivity and losses of nitrogen and carbon at the site or catchment scale.
W. Zhang   +14 more
doaj   +1 more source

Turbulent dispersion in cloud-topped boundary layers [PDF]

open access: yes, 2009
Compared to dry boundary layers, dispersion in cloud-topped boundary layers has received less attention. In this LES based numerical study we investigate the dispersion of a passive tracer in the form of Lagrangian particles for four kinds of atmospheric
Heus, T.   +3 more
core   +4 more sources

Model Analyses of Changes in Spring Surface Ozone Concentrations over Shandong Province in the Period of 2014–2017

open access: yesAerosol and Air Quality Research, 2022
The concentrations of surface ozone (O3) in eastern China have increased significantly in recent years, resulting in the earlier appearance of more serious O3 pollution.
Jialin Li   +6 more
doaj   +1 more source

A two-way coupled regional urban–street network air quality model system for Beijing, China [PDF]

open access: yesGeoscientific Model Development, 2023
Owing to the substantial traffic emissions in urban areas, especially near road areas, the concentrations of pollutants, such as ozone (O3) and its precursors, have a large difference compared to regional averages, and their distributions cannot be ...
T. Wang   +13 more
doaj   +1 more source

Controls on boundary layer ventilation: Boundary layer processes and large-scale dynamics [PDF]

open access: yes, 2010
Midlatitude cyclones are important contributors to boundary layer ventilation. However, it is uncertain how efficient such systems are at transporting pollutants out of the boundary layer, and variations between cyclones are unexplained. In this study 15
Adamson   +37 more
core   +1 more source

Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2012
Emissions of reactive nitrogen (N) species can affect surrounding ecosystems via atmospheric deposition. However, few long-term and multi-site measurements have focused on both the wet and the dry deposition of individual N species in large areas of ...
Y. P. Pan, Y. S. Wang, G. Q. Tang, D. Wu
doaj   +1 more source

Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
The ozone weekend effect (OWE) was first investigated in the metropolitan area of Beijing–Tianjin–Hebei (BTH), China, using in situ measurements from the Atmospheric Environment Monitoring Network from July 2009 to August 2011.
Y. H. Wang   +11 more
doaj   +1 more source

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